Twyer for stokers.



M. ALPERN. TWYEB,v FOR STOKERS. APPLIUATION HLED 1311.25, 1914.

l ,1 23,063., Patented Dee. 29, 1914.

2 SHEETS-SHEET 1.

, M. ALPERN. TWYER FOR STOKERS.

APPLICATION FILED 113.25, 1914.

'antea 1360.29, 1914.

2 SHEETS-SHEET 2` entre srans raarnnr onirica.

MAXWELL ALPERN, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR fllO AMERICAN ENGINEERING COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA.

TVVYER FOR STOKERS.

meshes.

Specification of Letters Patent.

Patented Dec. 29, i914.

Application led February 25, 1914. Serial No. 820,902.

To all whom it concern Be it known that I, MAXWELL ALPERN, a citizen of the United States, residing 1n YPhiladelphia., Pennsylvania, have invented certain Improvements in Twyers for Stokers, of which the following is a specification. j One object of my invention is to provide a novel form of twyer particularly designed for use with stokers of the inclined under lfeed type, the construction being such that the air is discharged into the fuel not only straight in front of the twyer but at the sides thereof-and ifdesired from the top also, with a view to obtaining the most etlicient and economical burning of said fuel; I further desire to provide a twyer havingv the above noted characteristics, which in addition shall be of such construction as to.

be conveniently' applied to or removed from the stoker of which it forms a part, the arrangement of parts being such as to facilitate the removal or insertion of any particular twyer.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, `in which,

Figure 1 is a perspective view illustrating a twyer constructed according to my invention; Fig. 2 is a plan of the twyer shown in Fig. l; Fig. 3 is a longitudinal section on the line a-a, Fig. `i2; Figs. 4 and 5 are respectively a. plan and a side elevationof a modified form of twyer; Figs. 6 and 8 are plans of twoother forms of twyers constructed according to my invention, and Figs. 7 and 9 are respectively side elevations of the twyers shown in Figs. 6 and 8.

Referring'to Figs. 1 to 3 inclusive of the above drawings, the twyer therein shown consists of a body portion in the form of a fiat relatively thin plate pointed at its front end and adjacent its straight rear edge provided with an opening or hole 2 for the reception of a similarly formed projection 3 belonging to a similarly formedtwyer immediately adjacent it in the Stoker. |Ihis projection 3 extends from the upper surface of a relatively narrow elongated raised portion 4 extending rearwardly from the point end of the twyer and disposed symmetrically on both sides of the central vertical plane of the body plate 1, there being on each side of this central projection, two inwardly extending portions 5 which are also raised above the top surface of the body plate 1 in such manner that they coperate with the central portion 4 to form air passages having outlets terminating on the inclined sides of the pointed end of the twyer. E ach of these air passages, however, is divided at its outer end by another raised portion 6 so as to form two air outlets 7 and 8 of which the former has its side walls so disposed that the air is discharged in a direction substantially at right anglesto the longitudinal center line of the twyer, while each of the latter 'outlets 8 is designed to discharge the air forwardly parallel to said center line. It is to be noted that all of the raised portions 4, 5, and 6 extend to the same height above the top surface or plane of the twyer body 1, the interlocking projections 3, however, extending beyond the plane of the top'surfaces of these portions at the rear end of the portion'4, while at the forward end of said portion I provide a lug 9 of L- shaped section designed to fit into a hole 10 formed in what is the under surface of the twyer shown in Fig. 1. This hole is forwardly under-cut as indicated at 11 to receive the projecting lip 12 of said lug, so that, as indicated in dotted lines in Fig. 3, the lug 9 extendsinto the hole 10 of the twyer next below that shown in full lines, while the projection 3 similarly extends into the opening 2 of the same twyer. By this means the units in each inclined column or series of twyers are locked together and since the twyer which lies immediately below that shown in Fig. l is spaced away from its body by the raised portions 4, 5 and 6, the air from the wind box at the rear of said series flows between the bodies of each pair of adjacent twyers, escaping from each side of the point of each twyer in two currents substantially at right angles to each other.-

It is to be noted that the width of the passages 7 is substantially three times greater than that of the passages 8 and they consequently deliver approximately three times as much air laterally from the twyers in lines substantially at right angles to the longitudinal lines thereof. Obviously, if the twyers arebuilt up in a number of series whose' units lie with their bodies uppermost vand the projecting portions 4, 5 and 6 exfrom the openings 7 and 8 necessarily flows at the point of delivery in substantially horf ing carried around izont-al lines. v

Adjacent the walls of the furnace the twyers of the outer series preferably hav'e the forms indicated in Figs. 4 and 5, the twyer body having the general outline indicated at 1 and formed with one of its sides substantially at right angles to its rear edge, while its other side for about half of its length is inclined, as indicated at 13. As before there is a relatively large air passage 7 which opens on the inclined side and which is defined by the surface of the body 1a, by a portion of the edge of a raised portion 4a, and by a second raised portion 5. The air passage 8, however, is omitted from this side of the/"twyer, although the opposite side thereof has an air passage 8a indicated in dotted lines in Fig. 4, whose sides are dened by the second -elongated side of the projecting portion 4a and by an edge iange or projection P4 extending along that side of the twyer at right angles to its rear edge. The front end of each twyer is substantially parallel to its rear edge and the air passage 8a opens thereon so that it discharges air at right angles to lthepassage 7. As before, the body of the twyer adjacent itsrear edge is provided with an opening 2 land there is a similarly formed lug 3 extending from the rear end of the raised portion 4. Adjacent the center of this portion is the opening 10,

which as before is under-cut at 11 for the reception lof the L-shaped lug of the next- In some cases the twyers of higher twyer.

be made as indicated in the side series may Figs. 6 and 7, the 'construction being substantially identical with that of Figs. 4 and 5 except that the air passage 8" is relatively narrow, and the side wall 14a instead of beat the front end of the the width of the outlet twyer so as to limit is substantially parallel of the air passage,

4 sided for the greater part of its length. In

this case the opening 2 land the lug 3` instead vof lying in the longitudinal linerpassing through the opening l0 and the L- shaped lug 9, lie in a line to one side of bu parallel to this latter liii'e.

In some cases the twyer may be if made with a plurality of forwardly ydirected openings and its airv assages,instead of having their side walls ormed on sweeping and relatively .gentle curves,'may be made of a rather more angular outline. The twyer body has the saineA eneral outline as in i. Figs. 1 to` 3 but its side raised portions 5c terminate adjacent the end of the sides deining the pointed end of the twyer, extending inwardly therefrom toward each other so as to provide a central air opening hose .width is about one-third the width of the twyer. Each of the inclined front edges of the twyer has two raised portions 15 and each of these portions being in turn spaced away from vone of the longitudinally extending strips 18v lying substantially parallel to but on opposite sides of the center line of the twyer body, each of said strips terminating a short distance from the inwardly projecting ends 19 respectively 'of the side portion 5. In this case the top surface of the body 1a has an elongated centrally placed rectangular lug 20, extending rear-- wardly from a point to the rear of the pointed end of the twyer, and so designed as to lit between the two projecting portions 18 of the twyer immediately above it. Somewhat to the rear 'of the' center of the twyer body is a downwardly projecting lug dethe elongated projections 18, being finally delivered from the twyer in three currents or streams, of which those delivered from 4the openings 21 and 17 aressubstantially at right angles to that delivered from the opening 22.

The particular advantage of the above f noted construction resides in the highly eili-v cient disposition of air in the body of fuel which results fromA its delivery in the streams substantially .at right angles to each other, for each of these streams flowing from the openings 8 or 17 and 21 are in the general direction of movement of the fuel, while those issuing from the openings 22 are substantially at right angles to such direction of movement and to a greater or less degree extend into the mass of fuel as it is delivered from the adjacent retorts.

I claim 1. A Stoker twyer consisting of a vrelatively lat plate having a poinged end; with raised portions projecting from one face of said plate, one of said portions extending rearwardly from the pointed end of the plate, another extending along one side thereof, and a third projection extending along the side of the pointed end away from each of the other raised portions to define air passages discharging inv lines substantially at right angles to each other.

'2. The combination in a twyer of a relatively flat plate having two inclined sides forming a pointed end; with a plurality of raised portions projecting from one face of said plate to substantially the same. level, two of said projectingv portions being respectivel at opposite sides of the rear portion of t e plate, another portion extending rearwardly from the front of the pointed end; and two others of the said portions lying respectively along the inclined sides of the end in positions'to coperate with the other projecting portions to dene air passages, of which those on each side of the center line of the twyer are formed to discharge in lines substantially at right angles to each other. v

3. A Stoker twyer consisting of a plate having a substantially rectangular body portion and a triangular end; with raised portions projecting from one face of said plate of which one extends rearwardly Jfrom the apex of said end, two others lie adjacent Y opposite sides of the body and two other portions are respectively on opposite sides of the triangular end, being spaced away from the other raised portions to form two sets of air passages of which those on each side discharge in lines substantially at right angles to each other.

In testimony whereof, I have signed my name to this speciication, in the presence of two subscribing witnesses.

v MAXWELL ALPERN.

Witnesses:

M. EMMA BURGEss, CHARLES L. SMITH. 

